PR5 — Cucumis sativus

Summary

CsPR5 (CSA_6G448170) on cucumber chromosome 6 encodes a thaumatin-like protein belonging to the osmotin/thaumatin-like superfamily, with glucan endo-1,3-beta-D-glucosidase activity. The gene is associated with systemic acquired resistance, defence responses to bacteria, fungi and viruses, and regulation of anthocyanin anabolism. It is linked to responses to abscisic acid, ethylene, UV-B, cadmium and osmotic stress. Localisation evidence places the product in the apoplast, plant-type cell wall, secretory vesicle, vacuole, plasmodesma and membrane. Phenotype associations include disease resistance, salt and drought tolerance, proline accumulation, and resistance to Verticillium dahliae and Pseudomonas syringae. Studies of related genes in other species connect the family to pathogen resistance, induced systemic resistance, herbivore defence, seed germination under salt stress, and cell wall integrity.